File:Hubble green filaments 20150402.jpg
Size of this preview: 800 × 379 pixels. Other resolutions: 320 × 152 pixels | 640 × 303 pixels | 1,024 × 485 pixels | 1,280 × 607 pixels | 2,560 × 1,214 pixels | 4,932 × 2,338 pixels.
Original file (4,932 × 2,338 pixels, file size: 3.93 MB, MIME type: image/jpeg)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
|
This image is a JPEG version of the original TIF image at File: Hubble green filaments 20150402.tif.
However, any edits to the image should be based on the original TIF version in order to prevent generation loss, and both versions should be updated. Do not make edits based on this version. |
Summary
| Description |
English: This image shows the winding green filaments observed by the NASA/ESA Hubble Space Telescope within eight different galaxies. The ethereal wisps in these images were illuminated, perhaps briefly, by a blast of radiation from a quasar — a very luminous and compact region that surrounds a supermassive black hole at the centre of a galaxy. In each of these eight images a quasar beam has caused once-invisible filaments in deep space to glow through a process called photoionisation. Oxygen, helium, nitrogen, sulphur and neon in the filaments absorb light from the quasar and slowly re-emit it over many thousands of years. Their unmistakable emerald hue is caused by ionised oxygen, which glows green. The Hubble team found a total of twenty galaxies that had gas ionised by quasars; those featured here are (from left to right on top row) the Teacup (more formally known as 2MASX J14302986+1339117), NGC 5972, 2MASX J15100402+0740370 and UGC 7342, and (from left to right on bottom row) NGC 5252, Mrk 1498, UGC 11185 and 2MASX J22014163+1151237. |
| Date | |
| Source | https://www.spacetelescope.org/images/heic1507a/ (image link) |
| Author | NASA, ESA, Galaxy Zoo Team and William Keel (University of Alabama, USA) |
| Other versions | TIFF version |
Licensing
|
This file is in the public domain because it was created by NASA and ESA. NASA Hubble material (and ESA Hubble material prior to 2009) is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA is credited as the source of the material. This license does not apply if ESA material created after 2008 or source material from other organizations is in use. The material was created for NASA by Space Telescope Science Institute under Contract NAS5-26555, or for ESA by the Hubble European Space Agency Information Centre. Copyright statement at hubblesite.org or 2008 copyright statement at spacetelescope.org. For material created by the European Space Agency on the spacetelescope.org site since 2009, use the {{ESA-Hubble}} tag. |
 |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:55, 3 April 2015 | | 4,932 × 2,338 (3.93 MB) | Rehua | User created page with UploadWizard |
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):
Global file usage
The following other wikis use this file:
- Usage on cs.wikipedia.org
- Usage on fa.wikipedia.org
- Usage on hi.wikipedia.org
- Usage on ko.wikipedia.org
- Usage on no.wikipedia.org
- Usage on ro.wikipedia.org
- Usage on sr.wikipedia.org
- Usage on tr.wikipedia.org
- Usage on uk.wikipedia.org
- Usage on uz.wikipedia.org
- Usage on zh.wikipedia.org
